Speaker attachment for radios



April 30, 1946. A. PTACEK SPEAKER ATTACHMENT FOR RADIOS Filed Dec. l l,1945 LOOSE.

T15 HT INVENTOR.

Patented Apr. 30, 1946 UNITED STATES PATENT OFFICE SPEAKER ATTAQHMENTFOR RADIOS Anna Ptaek, New York, N. Y. Application December 11, 1943,Serial No. 513,844 2' Claims. (01. 179-149) This invention relates tonew and useful improvements in a speaker attachment for a radio. Moreparticularly, the invention contemplates the association of a speakerattachment for a radio sender. It is proposed to use the sender incombination with a radio receiver. With this arrangement it is possibleto receive as well as I to send radio messages and other material.

More specifically, the invention proposes in a I radio set, a cabinethaving a compartment for a microphone for the radio set, and a novelarrangement of foldable supporting arm for said microphone, normallydisposed within said compartment and adapted to be extended to variouspositions.

A novel arrangement is alsoproposed for holding the foldable arm withits microphone extended to a convenient position for broadcasting.

For further comprehension of the invention, and of the objects andadvantages thereof. reference will be had to the following descriptionand accompanying drawing, and to the appended claims in which thevarious novel features of the invention are more particularly set forth.

In the accompanying drawing forming a material part of this disclosureFig. 1 is a perspective view of a combined radio receiver and radiosender provided with a speaker attachment in accordance with thisinvention.

Fig. 2 is a fragmentary enlarged sectional view taken on the line 22 ofFig. 1, but illustrated with the microphone extended.

Fig. 3 is a fragmentary enlarged vertical sectional view taken on theline 33 of Fig. 2.

Fig. 4 is a horizontal sectional view taken on the line 4-4 of Fig. 3.

Fig. 5 is a fragmentary plan view looking in the direction of the line55 of Fig. 2.

The speaker attachment for a radio, in 2.0-'

cordance with this invention, is used in combination with a radio set I0 having a cabinet II provided with a compartment I2. A door I3 ismounted on the cabinet for closing said compartment I2.

A foldable tubular arm I5 is mounted within the compartment I2 andsupports a microphone I6 for the radio set. Means is provided forholding said foldable arm I5 in various extended positions. The foldablearm I5 includes a short tubular base section I8 and a plurality ofalternating lon sections I9 and short tubular sections 20. The outermostlong section I9 supports the microphone I6. The adjacent end portions ofsaid sections are connected together withuniversal joints. Each of theseuniversal Joints includes a socket portion 2I on one of the sectionsengaged by a ball portion 22 on the adjacent one of said sections.

The means for holding the arm I5 in extended positions includes a cable23 extended through the sections of said arm I5. The inner end of thecable 23 is attached to a pin 24 mounted across the outermost sectionI9. This cable 23 is guided through guide pieces 25 mounted Within theball portions 22 or said universal joints. The cable 23 extends out fromthe bottom of the compartment I2 and engages around a roller 26 turnablymounted on a bracket 21. The cable 23 continues and engages through abayonet slot 28 formed upon a top panel 29 on the cabinet II. Thisbayonet slot 28 has a near branch 28 and a far branch 28*. A ball 3| ismounted on the end of the cable 23.

I Adjacent each of said universal joints of said foldable arm I5, thereis an abutment collar 32. Each abutment collar 32 is threadedly mountedon a section of said foldable arm I5. It is provided with a flange 33 bywhich it may be conveniently turned. It is also provided with a socketportion 34 adapted to engage over and abut against a point or points ofsaid adjacent joint.

When the ball 3| at the end of the cable 23 is in the bayonet branch 28,said cable 23 is loose. The foldable arm I5 may then be folded anddropped into the compartment I2, as indicated by the dot and dash lines.When it is desired to extend the microphone I6 it is merely necessary tolift the outer end of the foldable arm I5 outwards and hold the foldablearm I5 in any convenient position. The cable 23 is then pulled, and theball 3| is moved over to the far end 28' of'the bayonet slot 28. Thispulls the cable 23 tight.

It is advisable that the cable 23-be slightly stretchable so that itsresilient contracting action when tight, forces the various sectionscomposing the foldable arm I5 together, in relation to each other. Thistightly engages the ball portions 22 and the socket portions 2| of theuniversal joints, locking them in position. If one, or more of saiduniversal joints slips, and does not maintain a desired position, it ismerely necessary to, screw the abutment collar 32 downwards until thesocket portion 34 engages and grips and hold said universal joint in alocked position.

A feature 01' the invention resides in the fact that the radio set maybe used to receive radio in the usual way. When desired it may be usedto transmit radio. In the latter case it is merely position.

It is to be understood that this radio device may be or various designsand may be operated either on the usual house current or by electricbatteries.

While I have illustrated and described the preterred embodiments 01' myinvention, it is to be understood that I do not limit myseli to theprecise constructions herein disclosed and the right is reserved to allchanges and modifications coming within the scope or the invention asdefined in the appended claims.

Having thus described my invention, what I claim as new and desire tosecure by United States Letters Patent is:

1. In a radio set having a compartment for a microphone mounted on oneend of an arm having its other end mounted in said compartment andformed of separate tubular sections with ball and socket Jointsconnecting the sections permitting it to be collapsed into saidcompartment, means for locking said ball and socket joints againstcollapsing when extended from said compartment, comprising a cordextended through said tubular sections, said cord having one of its endsattached to the outer sections 01' said arm and its other end extendedfrom the inner section of said arm, and means on the latter end of saidcord for holding it taut to maintain the arm against collapsing,comprising a ball secured on the end oi said cord after the latter hasbeen necessary to extend the microphone into usable passed through abayonet slot, said slot having a branch spaced from said am for holdingthe cord taut and a branch positioned closer to said arm to relax saidcord when located therein freeing said arm to collapse.

2. In a radio set having a compartment for a microphone mounted on oneend of an arm having its other end mounted in said compartment andformed of separate tubular sections with ball and socket Jointsconnecting the sections permitting it to be collapsed into saidcompartment, means for locking said ball and socket joints againstcollapsing when extended from said compartment, comprising a cordextended through said tubular sections, said cord having one of its endsattached to the outer sections of said arm and its other end extendedfrom the inner section of said arm, and means on the latter end of saidcord for holding it taut to maintain the arm against collapsing,comprising a ball secured on the end of said cord after the latter hasbeen passed through a bayonet slot, said slot having a branch spacedfrom said arm for holding the cord taut and a branch positioned closerto said arm to relax said cord when located therein freeing said arm tocollapse, said branches being connected and said ball being of adiameter greater than the width of said branches to be used for movingthe end or said cord from one branch to the other.

ANNA PTAdEx

